First record of Thaumasia Perty, 1833 nursery web spider (Araneae: Pisauridae) preying upon Polistes canadensis (Linnaeus, 1758) (Hymenoptera: Vespidae) in the Neotropical region

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  First record of Thaumasia Perty, 1833 nursery web spider (Araneae: Pisauridae) preying upon Polistes canadensis (Linnaeus, 1758) (Hymenoptera: Vespidae) in the Neotropical region Abstract Thaumasia Perty, 1833 are opportunistic spiders that inhabit the Neotropical region. This study reports a spider of the genus Thaumasia preying upon Polistes canadensis (Linnaeus, 1758) in semiarid region of Brazil. A spider of the genus Thaumasia was observed moving rapidly from the fountain's water surface to capture an individual of P. canadensis . After successfully capturing the wasp, Thaumasia sp. was observed partially perched on the wall of the fountain, with the prey still on the water surface and trapped by its chelicerae. The pedipalps and chelicerae of Thaumasia sp. manipulated the head of P. canadensis , which stopped moving shortly after being captured, probably because of the action of the spider's venom. The study records a wasp in the diet of Thaumasia based on the ca...

Description of a new genus and species associated to the family Chaerilobuthidae Lourenço & Beigel, 2011 from Early Cretaceous Burmite (Chelicerata: Scorpiones)

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Description of a new genus and species associated to the family Chaerilobuthidae Lourenço & Beigel, 2011 from Early Cretaceous Burmite (Chelicerata: Scorpiones)

Abstract

One more new genus and species of fossil scorpion associated to the family Chaerilobuthidae Lourenço & Beigel, 2011 are described from Early Cretaceous Burmite. Spinochaerilobuthus Lourenço gen. n., with the new species Spinochaerilobuthus andreschmidti Lourenço sp. n., represents the third genus to be clearly associated to this familial group which is so far one of the most speciose among those known from Burmite. The new genus shows several clear morphological characters which can distinguish it from the two other known genera previously confirmed as associated to the family Chaerilobuthidae, attesting the existence of a marked generic variability within this family. Further comments on the variability of different morphological characters are also presented.

Lourenço W. R. & Velten J., 2026. – Descriptions d’un nouveau genre et d’une nouvelle espèce associés à la famille des Chaerilobuthidae Lourenço & Beigel, 2011 de l’ambre du Crétacé inférieur du Myanmar (Chelicerata : Scorpiones). Faunitaxys, 14(29): 1 – 8. https://archive.org/details/faunitaxys-f-430